Remove more out-of-date comments and clarify explanation of visit().
diff --git a/Lib/compiler/visitor.py b/Lib/compiler/visitor.py
index 934159b..52ea90d 100644
--- a/Lib/compiler/visitor.py
+++ b/Lib/compiler/visitor.py
@@ -26,13 +26,7 @@
the order during a postorder walk, because it is called _after_
the walk has occurred.) The ASTVisitor modifies the visitor
argument by adding a visit method to the visitor; this method can
- be used to visit a particular child node.
-
- XXX The interface for controlling the preorder walk needs to be
- re-considered. The current interface is convenient for visitors
- that mostly let the ASTVisitor do everything. For something like
- a code generator, where you want to walk to occur in a specific
- order, it's a pain to add "return 1" to the end of each method.
+ be used to visit a child node of arbitrary type.
"""
VERBOSE = 0